Pneumatic sheet-separating machine.



T. C. DEXTER & R. MEREDlTH. PNEUMATIC SHEEISEPARATING MACHINE.

APPLICATION FILED OCT. 7. I916.

Patented Dec. 4, 1917.

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T. C. DEXTER & R. MEREDITH. PNEUMATIC SHEET SEPARATING MACHINE.

APPLICATION FILED OCT. 7. 1916.

1,249,042. v Patented Den 4, 191?".

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PNEUMATIC SHEET SEPARATING MACHWE.

APPLICATION FILED OCT. 7. i916.

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PNEUMATIC SHEET SEPARATING MACHINE.

APPLICATION FILED OCT. 7. I9l6.

Patented Dec. 4, 1917.

5 SHEETS-SHEET 4- T. C. DEXTER & R. MEREDITH.

PNEUMATIC SHEET SEPARATlNG MACHINE.

APPLICATLQN. EILED ocr. 1.1916.

Patented Dec. 4, 1917.

5 SHEETS-SHEET 5.

3 save/wives now be readily understood is a pin on which the stop roller 46 is journaled A crank arm 47 which is keyed to the other end of the shaft as carries a pivot 48"to which isconn'ected the forward end of a rod 49 which carries-an. adjustable collar 50 to which is pivotally connected oncn ar1n5l ofga lever WlllCll 1s ournaled on av the beginning of the operation, sucker 10 having been lowered to the top cardboard sheet of the pile P. Closure 25 being in closed position, the top sheet seals the pneumatic system in such a way as to cause an immediate evacuation of t'he'cylinder which is accompanied by an upward movement of the piston therein and sucker 10 connected thereto. The parts now assume the positions shown in Fig. 3, in which the roller" stop 46 has moved rearwardly, while the sucker 10 has been elevated, thus serving to admit a blast of air beneath the rear corner and edge of the cardboard sheet. Cam 33 has by this time reached a position which permits the clamping foot 3-1 to'drop to the'pile in therear of the top sheet, thus assuming thejposition shown in Fig. 4:.

This movement permitsthe pin 4% carried by "the forward end of lever 29, to drop upon the cam rod 43 which projects rearwardly from the socket ll, thus causing the 40 stop roller 46 to be elevated, the top sheet being thereby released to move forward upon the blanket of air. This movement is also accompanied by a downward moveent of the closure 25 which opens the lower end of the pipe fitting 24 thus breaking the suction in the pneumatic system which releases the top sheet. As soon as the cam 33 has again operated thelever 29, the closure 25 is forced into closed position when the mechanism is ready for another operation. 1 i

'1. In a sheet-feeding machine, a pneumatic system including a sucker, means for moving said sucker down on to the top sheet of a pile, said sucker being adapted to be sealed by said top sheet when it rests on said top sheet, means operated by said pneumatic system when saichsucker is thus sealed, for raising said sucker'and said top sheet, and a stop movable into engagementwith said top sheet andover said top sheet towardsaid sucker.

2.111 a sheet-feeding machine, a pneuinaticsystem including a'sucker, means for moving said sucker down on to the top sheet of a pile, said suckerbeing adapted to be sealed by said top sheet when it'f estsf on sheet, a stop. movable into engagement with. said top sheet and over said top sh'eet'to-""' ward said sucker, and means for breaking the suction in said system to release the sheet and for raising said stop out-of enggagement wlth said sheet.

3. 111 a machineof the character de scribed, a sucker, means for lowering said j sucker on to the topsheet of apile in suitable position to be sealed by said top-sheet, rl means operated --by suction whenever i said sucker. is-sealed, for raising said sucker,

and a stop movable into and out of engage ment with said top sheetto cooperate with said sucker.

4. In. a machine of the character -described, a-sucker, meansfor lowering said a sucker on to the top sheet of a pilein suit'- able position to be'sealed by said top-sheet, means operated by suction whenever said suckeris sealed, for raising said sucker, a

stop movable into and out ofengagement with said top sheet to cooperate with said sucker, and means for moving saidstop out of engagement withsaid top sheet and breaking the suction of said sucker-raising means.

5. In a machine of the-character de- 4 scribed, a sucker, means for lowering said sucker on to the top sheet of a pile in suit able'position to be sealed by'said top-sheet loo means operated by suction whenever said suckeris sealed, for raisingsaid sucker, and

a stop movable into and out of engagement res tem including said sucker, and means operated by said pneumatic system when said sucker issealed by a sheet, for moving said oscillatory arm to move from the pile. y

7 In a pneumatic sheet-separator, a pneumatic system including a sucker movable down on to, the top sheet of a pile in posisaid top sheet away tion to be sealed by said top sheet, said syssucker with the'sheet, anda clamping'foot movable intoand out of clamping engagetern being adapted by the sheet to raise said ment with the pile, said system havingan; aperture provided with a closure operatively connected to saidclam'ping foot.

2. In" a pneumatic sheetseparating Ina-- -cl11ne, a sucker movable to the top sheet of a pile and adapted to be closed thereby, a

pneumatic system including said sucker for raising said sucker with the top sheet, said system being provided with an aperture other than the one in said sucker, a closure for said other aperture, a stop movable into engagement with said top sheet, and

Copies of this patent may be obtained for &

pneumatic system including said sucker for raising said sucker With the top sheet, said system being provided with an aperture other than the one in said sucker, a closure for said other aperture, a stop movable into engagement With said top sheet, means cooperatively actuating said stop and closure, and a clamping foot operated by the stop and closure actuating means.

TALBOT O. DEXTER. ROSS MEREDITH.

five cents each, by addressing the Commissioner of Patents, Washington, D; O. 

